I think looking at Chris's original criteria might help to see why he gave a B- for Ohio:
Breadth of Good Quizbowl
How many places across the state are running good quizbowl tournaments and competitions? Are all the major metro areas included? Are there rural schools participating or just metro schools? Are only a few areas active or is pretty much the entire state active? Could a new team get to a good quizbowl tournament in only a few hours drive or would every trip be basically an overnight all-day drive? Are there many AUK and NAC or other bad quizbowl-only participants that crowd out good quizbowl teams and tournaments?
This is definitely a place where Ohio isn't perfect; as mentioned, the Columbus and Cincinnati areas (I wish my job didn't kill any chances of me doing anything for the latter this past year, because this is an area where good QB has backslid with Walnut Hills and Sycamore not doing much anymore) don't have nearly enough going. The other major metro area in Ohio that doesn't have enough good QB is Toledo. (I'm not counting OAC here because I don't know how that factored into Chris's evaluation.)
Aside from that, there are a handful of teams that still attend Chipbowl for whatever reason. As far as getting rural areas going, this is definitely something I feel Ohio is doing better than most states, with the number of tournaments Greg's hosted in such areas of Ohio.
Depth of Good Quizbowl In the areas with quizbowl, how many teams compete in it? Is it just a handful of teams out of many possible schools or do pretty much all the major schools in the area participate? Are tournaments large with many teams and good quizbowl scheduling practices or are they small and single-elimination (or entirely double-elimination?)? Do schools normally just play one or two tournaments or do they play multiple tournaments over the year along with nationals?
Again, I'm not sure how OAC fits into this (although I do personally feel that the Regionals format could be improved). I do think this is an area Ohio's been good with; the only tournament I can think of where attendance really backslid this past year was Ohio State's. Still, as noted, in a good number of regions most teams won't travel much (you don't see a lot of Youngstown or Columbus area teams traveling to other cities to play tournaments, for example).
Institutional Support or Opposition (including state championships) Is there an official state organization that coordinates quizbowl and does that state organization support good quizbowl? Are there resources available for new teams to help build themselves and assistance for coaches (like a coach's association)? Does the state championship (and any local/regional championships) use good quizbowl questions and practices or bad? Is there a lot of AUK or NAC participation or leagues that use bad quizbowl questions and practices?
I don't know if Chris has seen the most recent OAC Regionals/States set, but given the reception it got throughout the state, I feel like it can only be a positive thing, assuming the set's quality is kept in future years (a very important thing, as I'm sure the OAC Committee is aware).
I'm guessing Chris didn't give the best marks here either, since OAC isn't in charge of TU/B quizbowl in the state, even if a good number of committee members do run such tournaments, so Ohio can't be compared to other states since there isn't an organization like MOQBA or IHSSBCA that is in charge of TU/B. That would be perfectly okay except for Chris's statement "a few key departures of coaches and some whole circuits could collapse." This is something I am a bit concerned about; imagine the Ohio circuit if there's no Greg Bossick, David Jones, et al.
Overall I'd agree with the general assessment (though I'd give a B, not a B-, which is the same grade as the state I'm currently in and I believe Ohio > Tennessee right now); there's lot of work to do, especially in certain areas of the state, but things are definitely looking up. Still, we need to get more people involved, especially in those problem areas.